The Harman Kardon Astra is a premium voice-activated smart speaker that delivers room-filling, 360-degree stunning sound. It features multiple drivers and tweeters for high-fidelity audio, letting you hear every detail, and is powered by Amazon Alexa Voice Service. The built-in 4-microphone array with noise cancellation provides best-in-class voice recognition. Just ask, and Alexa can play music, answer questions, place an order, control your smart home devices, and more.